Question

An investigation of the effectiveness of a training program to improve customer relationships included a pre-training and a post-training customer survey. To compare the differences, they computed post-training survey score − pre-training survey score. Seven customers were randomly selected and completed both surveys. The results are shown here.

Customer	Pre-training Survey	Post-training Survey
A	6	8
B	5	5
C	10	10
D	7	10
E	6	8
F	5	6
G	2	8

This analysis is an example of _______.

Multiple Choice

• a one-sample test of means

• a two-sample test of means

• a paired t-test

• a test of proportions

Answer 1

Solution :

Given that,

An investigation of the effectiveness of a training program to improve customer relationships included a pre-training and a

post-training customer survey. To compare the differences, they computed post-training survey score − pre-training survey score

This analysis is an example of a paired t-test .